Possible new cause for white screen and d-pad failures - 8525, TyTN, MDA Vario II, JasJam General

Hello
I have managed to come to the conclusion that the original cause for the d-pad failures is NOT the loose connector as described before. this connector is in fact surprisingly sturdy.
the problem lies with the little black IC on the keypad membrane.
i am taking my hermes tomorrow to my friends' phone repair shop and he is going to heat the IC up for me and allow it to reseat.
i shall report back tomorrow.
------------------------
just in case your wondering, i came to this conclusion by purposefully 'un seating' that IC and lo and behold, intermittent white screen and d-pad failures. however if i applied pressure to the IC it allowed it to make contact and it worked again, let go and white again.
many thanks

It will be interesting to hear the results on this BUT -
I'm not certain I agree with your methodology here though. I am not surprised that deliberately un-seating the IC causes a white screen! In all probability removal of any number of components will cause a white screen! AND of course heat gunning it again to re-establish it's connections will make it work again!
Unfortunately this does not prove to me at least that the IC is the problem for most people. If I remove a capacitor from my TV and the picture goes, I cannot conclude that everyones picture problems are related to that capacitor. The D'pad connection though it may appear sturdy has a set of very fine connections and it only takes one to be fractionally bent or oxidised for you to get the whitescreen or indeed a poor connection of any component or connection.
However the IC was reported on in the loooong white screen thread where some folk found that placing padding on the IC surface or squeezing it would correct the white screen and thereby concluded that it was an IC connection fault.
Of course the problem is IMHO that there are several possible causes and any individual person can have one or a combination of things causing the white screen. So far we have as possible causes:
D/Pad connector (must be seated firmly and FLAT but neither over tightened nor too loose. The pins may also get slighly bent or oxidised so cleaning them or fractionaly bending them may work
The D/Pad IC may have poor contacts.
The LCD Flex cable may have cracks (but less likely in my view)
Some have reported capacitor faults (possibly poor connections or degradation with heating or current draw) on both D/Pad and M/board. These faults may be related to the whitescreen only appearing after 10 or so minutes of use and recovery after switching off for a while.
Heating up - in some cases the whitescreen only appears when the phone is warm/hot. This may be caused by expansion of the multi-layered board causing poor contacts / or possibly components not performing correctly due to heat or current draw.
Often some of these whitescreens can be made to disappear by putting pressure on certain components / connections or even in some cases by squeezing the phone casing near the D'pad area. So all in all it is likely to be poor contact somewhere, it's just that it can be in several possible locations - including but not exclusively the D-Pad IC.
Mike

first of all, can i just say what an honour it is to have you comment on one of my threads!
second of all, i am only trying this as a last resort to revive my hermes before i jump ship to the raphael/diamond. or unless i decided to buy a new keypad PCB for it in the hope it will fix it!
i shall report back as soon as ive been down to the shop
many thanks

hi there
i had the white screen initially and although intermittent was useable, then, progressively got worse. countless reseats of the cable, time and time again, including put 'foam' in the places indicated then i did indeed notice in that post about the ic
so, i decided to experiment with the IC. first two layers of paper on top, made some difference in that i had to apply less pressure to get it to work, and then i though, id heat it up slightly using a hairdryer (only thing i had to hand!) and a nozzle made out of a drinks can and just pry it up gently. and indeed the white screen was permanent although the phone otherwise was functioning.
so, i'm taking it down to my mates tomorrow or as soon as i get a chance and he's gna have a go at reseating it using his fancy hot air gun rework thingumajig
i would definetly go for the raphael! for the sole reason that it has a VGA screen! (im an ebook nut!) and it looks beautiful!lol
will keep this post updated

i have to agree with mike on this ,there are many problems that can cause the white screen problem. But i am betting that heat is the major culprit,wether it is the IC you mention ,is another discussion, unless of course your friends attempt at reseating the IC cures the problem ,once and for all. Good luck anyway. I am keen to find out if it was successful or not

Hi there
well, he had a look at it under some fancy microscope and confirmed the IC was not sitting 'true' meaning not 100% level, he also used some little jig he had which he sat the board in and it confirmed it wasnt level
so, he heated it, and allowed it to reseat and we tried it again and it appears that did not solve it. we used another flex cable from his own spv and it still didnt work, my cable ran beautifully in his spv too though.
so, im going to find a replacement keypad pcb now and go ahead and buy it and see if i can get it to work

Hi
ive been hunting for the last hour and i cant seem to locate a d-pad anywhere
if i was to use a cingular 8525 d-pad in my vario II it would still work, just button orientation would be different wouldnt it?
do you know of anywhere where i could get one?

I'm having whit screen prob on my wizard and a complet housing case change. I didn't know a keyboard can cause white screen. I was looking to buy a new flex cable. what's the ic and who do I heat?

Related

Vario II Touch Screen goes off :(

Hello
I bought mine Vario II (with CoPilot) just 8 days ago, so I've enjoyed it quite a lot for the past days
yet .. ~30 hours ago I found out that the touch screen was not responding at all .. well restart did not help, getting the battery out and putting it back again didn't help too ... I tried to do EVERYTHING with the thing ... starting with restoring factory settings (all the data! ) , ending with browsing the forums for common failures ...
Finally I ended up with the very start page where the Vario II asks for tapping the screen (irony huh ?) to start setting it up ..
Since I was not able to make it work again (the whole thing seemed to be working fine ... just the touch screen ... ) so I brought it to the local T-Mobile shop today in the morning.. guess what, the guy at the shop just removed the battery and put it back again (I've done that XXX times during the night) AND IT STARTED WORKING again ... I couldn't understand anything there, felt really lame
anyway after I've left the shop and used it for quite a bit it started again .. now I've kind of figured it out .. when I'm using the device actively (the temp raises) and it starts at the top right corner of the screen .. the touch screen just flickers there and then after a minute or so it doesn't respond at all any more .. if I just put it away and don't use it - the screen responds again after some time ...
NOW finally the question is: has anyone had any problems with Vario II like I do? I ought to think that it is a somewhat faulty device that I've got (it hasn't been physically damaged)
PS the touch-screen gets stagnant faster with bigger programs (CoPilot, Skype, etc...) and it takes some time to get stuck with just using the phone...
btw I've put a temperature thingy in the device - it shows that the battery temp is at 42 C . Isn't that a bit too much ?
yeah and how do I figure out what version it is ? I mean the S/N that is mentioned here ( http://wiki.xda-developers.com/index.php?pagename=Hermes_Problems )
?
wundis said:
anyway after I've left the shop and used it for quite a bit it started again .. now I've kind of figured it out .. when I'm using the device actively (the temp raises) and it starts at the top right corner of the screen .. the touch screen just flickers there and then after a minute or so it doesn't respond at all any more .. if I just put it away and don't use it - the screen responds again after some time ...
NOW finally the question is: has anyone had any problems with Vario II like I do? I ought to think that it is a somewhat faulty device that I've got (it hasn't been physically damaged)
Click to expand...
Click to collapse
Yes, one of my Hermes' had the exact same problem - touch screen malfunction starting at the upper right corner when temperature rose. The usual tricks to solve the screen alignment problem (loosening the screws, removing the gasket with a stripe of a business card) didn't help at all. I returned the device and got a new one.
yeah and how do I figure out what version it is ? I mean the S/N that is mentioned here ( http://wiki.xda-developers.com/index.php?pagename=Hermes_Problems )
?
Click to expand...
Click to collapse
It's printed on the box (at least of an O2 Trion) and on the sticker underneath the battery. Just look for the S/N starting with HTC6xx... but "our" defect is not the normal SA problem, it seems to be much rarer and not described in the Wiki.
Cheers
Daniel
Thank you so much for the answer Daniel, I'll get them to change it tomorrow.
I have exactly the same problem with my TyTN. In the morning, after the phone has been off all night, the touchscreen works for maybe 30mins, then the phone warms up and the screen ceases functioning. Bizarre though - I got the phone about two weeks ago - the screen worked fine (i.e. under all temp. conditions) for about 7 days, then it decided to crap out. Tried all the usual SA type solutions - as you guys noted above they didn't work. Gonna have to go back to the shop and get it replaced :-(
Oh, nearly forgot, s/n is HT632
One other thing I noticed (not sure if this is normal behavior or if it started after the touchscreen borked) - When the phone is active (i.e. not locked or in standby,) the top status leds (wifi, bluetooth, gsm) don't flash. Once the device is put in standby (i.e. tapping the power button) they start flashing again. Like I said, not sure if this is normal or if its related to the touchscreen going.
Vrobenmat said:
One other thing I noticed (not sure if this is normal behavior or if it started after the touchscreen borked) - When the phone is active (i.e. not locked or in standby,) the top status leds (wifi, bluetooth, gsm) don't flash.
Click to expand...
Click to collapse
This is definitely not normal. But it's an interesting observation. If the TyTN were a car, I'd say there's a bad ground connection somewhere.
Try a hard reset, and if that doesn't solve the problem, have it exchanged. (I very much doubt that a hard reset will help, but at least here customer service refuses to exchange a device before you tried a hard reset. )
Cheers
Daniel
Hard reset borked even more. Could't get past the touch screen calibration. Phone is now in the freezer to cool down - hopefully the touch screen will work long enough so I can get past the calibration
*EDIT* Just got it out the freezer (nice and cold now.) Hard reset, got through the calibration, everything ok for about 10 mins. LED's flashing with backlight on and touchscreen working. Then - touchscreen non-responsive at exactly the same time the status LED's cut out. I'm hypothesising that there's some kind of electrical short between the circuitry for the touchpad and the status LED's - it shorts as the devices temperature rises and (i guess) some of the materials expand and come into contact with each other. Since I don't want to void my warranty in case I have to take the phone back to the store, I haven't opened it up to confirm this. Has anyone had a detailed look at the connections at the top of the screen and around the status LED's to see if my explanation is at least possible? (then I might open it up and see if I can insulate the connections.)
tadzio said:
Yes, one of my Hermes' had the exact same problem - touch screen malfunction starting at the upper right corner when temperature rose. The usual tricks to solve the screen alignment problem (loosening the screws, removing the gasket with a stripe of a business card) didn't help at all. I returned the device and got a new one.
It's printed on the box (at least of an O2 Trion) and on the sticker underneath the battery. Just look for the S/N starting with HTC6xx... but "our" defect is not the normal SA problem, it seems to be much rarer and not described in the Wiki.
Cheers
Daniel
Click to expand...
Click to collapse
I have the exact same problem!!
Two additional points :
1) my device screen will not switch off automaticaly and will stay on for ever unless I switch it off
2) When the issue manifests itself for the first time the device would automaticaly go back to the today screen like if the OK button would have been pressed many time or ... was stuck!!
That's my second Tytn device the first one had the SA defect.
I was so happy when I got my new one because the S/N showed HTC637XXX but sounds like a new issue even though I'm pretty convince that that the SA issue is not far from being related to this one.
My device SPV3100 HERM100
Hello lads,
Absolutely everything you've posted seems to be happening to my device.
Now the touch screen fails to respond even if it's cold (been lying on the bed for 5 hours doing nothing at all .. ). damn... seems like I'll have to ask the local shop to get me a free portable refrigerator for the thing to work properly
HT645
Vrobenmat said:
Hard reset borked even more. Could't get past the touch screen calibration. Phone is now in the freezer to cool down - hopefully the touch screen will work long enough so I can get past the calibration
*EDIT* Just got it out the freezer (nice and cold now.) Hard reset, got through the calibration, everything ok for about 10 mins. LED's flashing with backlight on and touchscreen working. Then - touchscreen non-responsive at exactly the same time the status LED's cut out. I'm hypothesising that there's some kind of electrical short between the circuitry for the touchpad and the status LED's - it shorts as the devices temperature rises and (i guess) some of the materials expand and come into contact with each other. Since I don't want to void my warranty in case I have to take the phone back to the store, I haven't opened it up to confirm this. Has anyone had a detailed look at the connections at the top of the screen and around the status LED's to see if my explanation is at least possible? (then I might open it up and see if I can insulate the connections.)
Click to expand...
Click to collapse
Might get a chance to have an internal look tomorrow. From memory, and can't remember if the Wiki or Japanese dismantling site shows this, but I recall only a single mylar ribbon cable coming from screen area through to main board. There are if memory serves push in multi connectors from the bottom hard keypad and from front camera board (inc LEDs) to the muti ribbon cable on the back of the screen. Thus, simply put the screen, camera,hard phone keys all connect at the back of the screen to a single multi ribbon cable that goes to main board. Possibility then of a short with digitizer is at least possible. Of course digitizers are suceptible to current leakage and field interference so would not have to be an actual physical contact but could just be a close proximity issue.
Mike
Facing the same problems...
... I've been thinking about repalcing the display and the touchscreen. But now, considering that it is a HW issue, I can only replace these two things. If the bug is in the module above the screen (statur leds and camera) or related to the wireing at the back of the screen, it won't get rid of the problem. On the other hand, if it is a problem with the screen getting too hot, then I'm on the right track...
Has anyone tried this yet?
I'll try to call HTC on monday, maybe they know where the bug is.
HTC is not able or not willing to share what they know about the problem...
Hello, they excuse my English, I am possessor of a TYNT and I am with he himself problem that you, the problem is a failure of weld in the processador, when it reaches certain temperature fails and cooling it or pressing strongly on the processor it lets fail.
Greetings.
ezbook said:
Hello, they excuse my English, I am possessor of a TYNT and I am with he himself problem that you, the problem is a failure of weld in the processador, when it reaches certain temperature fails and cooling it or pressing strongly on the processor it lets fail.
Greetings.
Click to expand...
Click to collapse
There may well be truth in what you say, I too believe it is something similar in some cases.
Do you have any proof of your suggestion. Can you provide pics or a diagram of the solder point you mean??
Mike
Hmm? The processor...?
...sorry, don't think so.
It's just that this bug occurs after using a device for months, isn't it?
Now, the first two weeks I installed all kind of programs using the wireless LAN almost permanently. My Hermes was never as "hot" as during its first two weeks. And what about the sliding-out of the keyboard? Doesn’t it always start there? This just doesn't sound right, does it?
Just received an email from someone who drew my attention to the ribbon cable connecting the upper and the lower part. What if there is a short one due to the plastic scratching the cable and then... who knows?
However, I do not disagree as far as the temp is concerned. Therefore, I'll put my Hermes on ice and see how long it does things right...
And still, there is no chance that it is related to the processor. If the processors ALU is getting too hot the entire device would be effected, wouldn’t it?
Anyways, I'm determined to find out what it is!
++ I just found a very peculiar post in the WIZARD forum. It was about some top-side buttons that kept pressing
++ without even touching… Opening the assigned programs over and over again. Odd, isn’t it?
++ That’s a HTC device AND has a sliding keyboard with a ribbon cable as a connector…
++ Yet, it operates with a different processor on a different main board.
++
++ Still blaming the processor?
microft said:
...sorry, don't think so.
It's just that this bug occurs after using a device for months, isn't it?
Now, the first two weeks I installed all kind of programs using the wireless LAN almost permanently. My Hermes was never as "hot" as during its first two weeks. And what about the sliding-out of the keyboard? Doesn’t it always start there? This just doesn't sound right, does it?
Just received an email from someone who drew my attention to the ribbon cable connecting the upper and the lower part. What if there is a short one due to the plastic scratching the cable and then... who knows?
However, I do not disagree as far as the temp is concerned. Therefore, I'll put my Hermes on ice and see how long it does things right...
And still, there is no chance that it is related to the processor. If the processors ALU is getting too hot the entire device would be effected, wouldn’t it?
Anyways, I'm determined to find out what it is!
++ I just found a very peculiar post in the WIZARD forum. It was about some top-side buttons that kept pressing
++ without even touching… Opening the assigned programs over and over again. Odd, isn’t it?
++ That’s a HTC device AND has a sliding keyboard with a ribbon cable as a connector…
++ Yet, it operates with a different processor on a different main board.
++
++ Still blaming the processor?
Click to expand...
Click to collapse
And you are right too! if it appears that I am tending to agree with both above posts when on the face of it they disagree with each other it's because:
1
There are different manifestations of this problem - the causes may not always be the same
2
I agree it's NOT the processor and firmly believe it's hardware related. Of course it could be be a break (sometimes intermittent) in contact somewhere between screen and board or even a broken contact on the board (IN SOME CASES)
3
In other cases it's just pressure being put on the touch sensitive screen often at the very inconvenient top right corner that closes/minimises applications or opens start menu.
There has not been a reliable way to fix this issue other than device replacement. Replacing the screen has been notable for it's failure to resolve the issue.
Mike
mikechannon said:
And you are right too! if it appears that I am tending to agree with both above posts when on the face of it they disagree with each other it's because:
1
There are different manifestations of this problem - the causes may not always be the same
2
I agree it's NOT the processor and firmly believe it's hardware related. Of course it could be be a break (sometimes intermittent) in contact somewhere between screen and board or even a broken contact on the board (IN SOME CASES)
3
In other cases it's just pressure being put on the touch sensitive screen often at the very inconvenient top right corner that closes/minimises applications or opens start menu.
There has not been a reliable way to fix this issue other than device replacement. Replacing the screen has been notable for it's failure to resolve the issue.
Mike
Click to expand...
Click to collapse
So do you think the bug is to be found on the main board at all?
I'm planning to replace some parts from the screen half. In fact there are just 3 possible error sources:
1) The lcd in combination with the digitalizer;
2) The ribbon cable connecting screen parts and keypad at bottom; and
3) The keypad at the bottom itself
The ribbon cable includs the electronics for the status leds as well as the EARphone. ;-)
Soon I will be on all three of the above parts and if the error ain't there... I'm going to be MAD.
Will keep you IN THE LOOP!
Hello again, my conclusion is based on which I have disassembled my TYNT completely and I have connected it without the keyboard, of this form I have hoped to that it began to fail, later I have been moving and touching in any case the flat cable that unites the motherboard with the screen, the small circuit that takes built-in without obtaining results, single I have even obtained that it returns to work blowing air on the strongly pressed processor or on. Another observation is that if just ignited the machine and working correctly we applied single heat on the processor, begins to fail the touch screen. To my also is to me strange east failure since the temperature of the processor is not excessive when it fails, in fact desire firmly to be mistaken because there am lost the guarantee. Seguire investigating is matendre informed to you.
Greetings.
microft said:
So do you think the bug is to be found on the main board at all?
I'm planning to replace some parts from the screen half. In fact there are just 3 possible error sources:
1) The lcd in combination with the digitalizer;
Click to expand...
Click to collapse
May be a fault there, but if it's just a squeeze due to heat ? pressure it may not resolve the issue.
2) The ribbon cable connecting screen parts and keypad at bottom; and
3) The keypad at the bottom itself
The ribbon cable includs the electronics for the status leds as well as the microphone.
Soon I will be on all three of the above parts and if the error ain't there... I'm going to be MAD.
Will keep you IN THE LOOP!
Click to expand...
Click to collapse
I assume you mean earphone above as the microphone is on the mainboard.
Mike
Again I have tested, with the disassembled machine totally, start up it, I hope to that the touch screen does not respond and I put my tynt in the refrigerator, after two minutes and without moving I touch it the screen and magic, works correctly hata that again coje the room temperature.
Greetings.
ezbook said:
Hello again, my conclusion is based on which I have disassembled my TYNT completely and I have connected it without the keyboard, of this form I have hoped to that it began to fail, later I have been moving and touching in any case the flat cable that unites the motherboard with the screen, the small circuit that takes built-in without obtaining results, single I have even obtained that it returns to work blowing air on the strongly pressed processor or on. Another observation is that if just ignited the machine and working correctly we applied single heat on the processor, begins to fail the touch screen. To my also is to me strange east failure since the temperature of the processor is not excessive when it fails, in fact desire firmly to be mistaken because there am lost the guarantee. Seguire investigating is matendre informed to you.
Greetings.
Click to expand...
Click to collapse
This is very interesting. When I said above it is not the processor, I meant it is not a software issue related to the processor. It can of course be a heat related problem with the processor. To summarise what you have found:
1
You have a device that when first started works OK
2
If you apply heat (but not much) to the processor it fails
3
If you apply pressure to the processor it works again
4
It begins working again when you blow on the processor or put it in the fridge.
5
If you move/press or ensure the ribbon cable has a firm contact - this has no effect.
Please post if any of the above is NOT correct ALSO please post which chip you are heating/pressing.
Cheers
Mike
Hello again, everything is correct except point 3 really when this failing and you press on the then microprocessor the touch screen works correctly. Associate images.
Greetings.
EDIT by Mike. Point 3 has been edited in Mike's post to show the correct situation.

Hermes White screen

I have read many threads and forums about the problem of the Hermes becoming white. The soft reset in this case does not help.
I found the explanation in my case and I am not able to fix it quickly, without opening the device to screw the connector.
The problem is only due to the temperature of the device. When the temp is to hot, the screen is white, in my case, it typically happens when it stays in my pocket et I moving too much throug the office ;-)
Solution, simply open the keyboard and gently blow in the thin area between the two parts of the device.. in my case, the screen comes back in 2-3 seconds.
Enjoy !
Eric
Hermes/Schaps 4.31/Orange CH
To be honest, I have this problem on my 838 (wizard) previously.
I have found someone (engineer who I need to pay) help me to check.
It is actually the connection cable between the keyboard and screen start breaking.
This makes the connection poor.
End up, my wizard cannot be repaired and I have borrow my freinds hermes to use in the mean time.
I suggest you pay special attention to it.
I suppecm that you blow it is actually helping the connection of that cable.
huh
are you guys serious in what you're talking about?
blow in between the two parts of the device when it's hot to get the connection of the cable back?
are you sure you are talking about a mobile phone and not about a compressor?
thanks for your feedback. I am convince that in my case, the gentle blow does not move the connecting cable.
Additionaly, the tipical symptom reported in various thread is that the soft reset does not help, while letting it apart for 15 minutes does help. It can confirm that the simple temperature idea is fine.
Again, it works for me, it can help others, and sorry for the others that won't find a solution with mine!
actually, i am neutal to this topic.
But just want to share my experience.
In my case, my cable is aging. Initially, it can help with slide the keyboard open and close.
End up the engineer told me that cannot be repaired deal to no parts. he examined it using a microsope watching the cable.
no need to take it too series.
It is a cable connection issue, it is caused by either dropping or opening and closing the device numerous times. It can be fixed the part cost around $20 kinda hard to find but can be found if you search enought. I can repair the device if your interested either pm me or you can contact me at
[email protected]
nate
when this happened to my hermes last August i found slightly unscrewing the two screws on the back of the screen fixed it & not had a problem since
didnt know what the white screen was 'till i got it right after the external volume crapped out, so tired of tinkering with hermes, going Kaiser
As a science experiment I have bought a number of hermes on ebay- it is a cable connection issue or worn cable in the 4 I have played with - all fixed by cleaning and reinstalling cable/connection or replacing the cable assembly. I cant say this is the only bug but 4 outy of 4 inducates a trend to me
John
Oh my gosh, topic starter, that is the same exact issue that I frequently have with my 8525. I eventually found out that if I leave it in direct sunlight, put it in my pocket for too long, or in anyway expose it to relative heat, then it would turn white.
That's a nice "fix" you have there hahah. As for me, I just let it cool down by placing it in a cool and shaded place, works like a charm after a few minutes.
Anyone with a WHITE screen MUST READ this!!!
To bring credit to what I say below, I haved had tinkering experience with electronics for the past 10 years, not to mention that I am currently a 3rd year electronics engineering student.
I currently have 4 hermes units.
When I first had the white screen prolem on my first hermes about a year ago (may be 8-10 months?) my research on the net revealed that the problem is apparently the connector on the button pad board (part number 50H000380-30M-A). After serious tinkering and tweaking I finally got the (extremely sensitive) connector connected up so that the white screen issue actually dissapeared. However, since the connection was so delicate and so sensitive, I had to fix it in place with a hot glue. Hot glue actually added some thickness to it; given that there isn't much tolerance between the top of the connector and the cover, I needed to scrape away some plastic without putting a hole in it so it can accommodate the extra thickness, this is also required for the sliding function to be smooth.
However, right now I have 4 hermes, and I am faced with the same issue. On two units I have the white screen problem. After some intuitive testing I have found that the problem is not with the flex cable, nor with the connector on the flex cable, nor the connector on the button pad board. The problem is with the actual button pad board itself, as it contains fair bit of circuitry on board.
This is how I came to the conclusion. Since the white screen can be fixed with sensitive alignment of the connecor on the board, I wondered if it will display anything with that D-pad (button pad board) disconnected. On trial, it didn't display anything on both a functional unit and a unit with a white screen issue. From this I made the assumtion that the LCD initialisation sequence is contained on the button pad board (part number 50H000380-30M-A).
Having made this assumption, I thought since the symptoms of having it disconnected on a functional unit is the same with a unit that has the white screen symptom, I wondered if it will fix the white screen problem if I changed over the button pad board. On trial, I found that the white screen problem was a thing of the past. So, I don't know what on the button pad board actually causes the white screen, but it is DEFINITELY the board it self and not the connector.
PS: I don't know the proper names of the components but by the button pad board I am talking about is the board that lies under the front buttons of the unit that has the call, end call, start, ok...etc buttons.
uengin, u totally had make ur homework regarding the white-screen-issue.
Anyway, for me, I face the exact problem too. And my way is much simpler. When ever I face the white-screen problem (this cause by the high temperature, coz I notice it only happen when I put my 838 on my pocket while walking during sunny day), I simply turn off the screen for a while (by lightly pressing the power button), like 3-5 second, then turn on the screen back. And, voila~ it back to normal.
i get a white screen when i press on the plastic casing on the lower right side of the screen, above the right bar button. no temperature involved here. sending the hermes to sleep and waking it up restores the normal screen.
pcpc said:
i get a white screen when i press on the plastic casing on the lower right side of the screen, above the right bar button. no temperature involved here. sending the hermes to sleep and waking it up restores the normal screen.
Click to expand...
Click to collapse
There's actually a BGA chip in that vicinity on the button pad circuit board. It may or may not be that chip thats causing the issues, but I find it higly likely it is...
uengin said:
There's actually a BGA chip in that vicinity on the button pad circuit board. It may or may not be that chip thats causing the issues, but I find it higly likely it is...
Click to expand...
Click to collapse
if it is the chip, then this would be a loose soldering point?
would you recommend to handle the hermes with great care? eg. not putting it in my trouser pocket because oft the pressure?
pcpc said:
if it is the chip, then this would be a loose soldering point?
would you recommend to handle the hermes with great care? eg. not putting it in my trouser pocket because oft the pressure?
Click to expand...
Click to collapse
I doubt its a "loose" solder joint. It could be a dry joint. But then again you never know. However, the symptoms with the heating and cooling mentioned in the thread it could be one of the several devices on the button pad board failing due to heat.
As a general rule of thumb, definitely electronic devices of this calibre should be dealt with a level of care indeed.
nohanz said:
uengin, u totally had make ur homework regarding the white-screen-issue.
Anyway, for me, I face the exact problem too. And my way is much simpler. When ever I face the white-screen problem (this cause by the high temperature, coz I notice it only happen when I put my 838 on my pocket while walking during sunny day), I simply turn off the screen for a while (by lightly pressing the power button), like 3-5 second, then turn on the screen back. And, voila~ it back to normal.
Click to expand...
Click to collapse
Same for me which seems software issue but how to solve it
I'm having white screen problem too. I highly doubt it has anything to do with a cable because:
1) I almost never use keyboard, aka don't slide open the phone
2) lately white screen often happens when I touch a screen.
3) several times white screen got fixed by holding the phone next to aircondition outlet.
4) white screen recently started at the same time I've noticed that the battery started dying, it doesn't last as long as before. Before this battery I had another one, similar, and also never had white screen while that battery was new.
To conclude all this, at least in my case is more likely it's a battery issue and/or overheat. Tomorrow I'll use the original battery (I've replaced it with 3k mAh 2 years ago) this should proof me right or wrong.
My white screen issues started after a waist-high drop onto concrete, accompanied by the D-Pad and the surrounding buttons not working. In order to get the white screen to go away and the buttons to work again, I have a simple 2-step process:
Put the Hermes to sleep
Press hard right above the D-Pad/below the screen
When I wake the device up, it works just fine!
Interesting Find......
I just noticed something about my white screens.
IF the poweron led does NOT turn on then I get white screen when turning on my hermes.
If the poweron led turns ON(lights up) when turning my phone on then it won't white screen on me.

Hardware Issue: Screen flickering/stripy

Hi all.
I have a strange hardware issue with my hermes device.
Suddenly the screen started to *vanish, meaning when turned on, it turns all white/shows little stripes.
I figured that there must be a defective contact from the board to the screen.
I took the whole phone apart already, and reaatached all plugs/contacts.
This helped for a few days, but now I start getting the same flickering again.
Did anyone in here run into the same issues with this device?
If yes, how did you fix it? What can i do, to get the contacts stay in place?
Thx for your advice,
trial
Hi,
The Screen LCD has a black ribbon at the back which attach's back to the main board. It could be:-
(1) That the ribbon is not alinged or fully home in its cradle. If you prob the cradle with a screw driver (gently) you will find it opens upward and thus you can remove the ribbon, clean then replace and close the cradle lock.
(2) More likely that (hard to explain but if you tinker you will work this out) the componets around the camera include a power regulator to the LCD display. It is held in place by the case and if not seated correctly prior to closing the unit will move and thus the LCD losses nearly all abilty to be seen & sometimes causes the flicker you describe.
Hope this helps. For novices be aware that tinkering often leads to breakage and while I'm happy to break things you may not be and thus I'm only another blind fool leading you on a path of destruction !! lol

X1 Build-Quality woes & Assembly/Repair Tips

=======
Introduction:
=======​
Hey everyone, I'm just posting this tirade about my problems with the X1's build quality here in case anyone else is suffering from the same problems I had, as well as some tips regarding disassembling and re-assembling the phone if you're brave/foolhardy enough to attempt repairs yourself, like me.
With contributions from others this thread could become a compendium of common hardware problems with the X1 and how to identify or fix them, as well as pitfalls to watch out for when repairing the device by hand.
I don't have any diagrams yet because I simply couldn't stomach opening up the shoddy device again to take photos.
=======
My X1:
=======​
I bought my X1 on eBay second-hand (my first major mistake) so I was always a bit worried what would happen when the day inevitably came when I'd have hardware problems with the phone.
However, I bought it very shortly after the phone's release and the seller described it as unused. The phone appeared mostly unused when I received it, apart from a couple of tiny scratches on the casing.
The phone was functionally fine when I received it and showed no problems whatsoever for the first few months.
Like seemingly everyone my first hardware problems with the phone (I won't even get into the device's software failings) that developed over time were an unresponsive keyboard, cracks in the case and a non-functioning vibration motor.
The 'r' key on my X1 took considerably greater force to register a press than any other key on the device, while other keys intermittently ignored presses or interpreted a single press as 2-5 presses while typing.
The spacebar also intermittently became unresponsive, as did the 'up' key on the front-mounted optical joystick.
The vibration motor worked at first, but eventually gave only a single loud 'click' when the phone should vibrate.
The problems worsened over time and despite taking good care of the phone, the casing started to look badly banged-up - This is not a phone that ages gracefully.
=======
Replacement Parts
=======​
In early December I ordered a replacement casing & keyboard from a supplier in Hong Kong on eBay (mistake #2), happyhouse.cn .
The parts were suspiciously cheap compared to the ones from non-ebay suppliers, so I assumed they would be imitation/unofficial parts, not from SE.
At first glance, the new casing and keyboard seemed like the real deal, but when I attempted to re-assemble the phone with the new parts I found that the phone's original screws didn't properly fit the sockets of the new casing and that the new keyboard didn't fit either the new casing OR the old one.
I ended up using a mixture of new and old parts to rebuild the phone.
=======
My Repairs
=======​
Over the course of 'fixing' the phone, a few other problems came to light within the device's internals.
A couple of these problems were apparent as soon as I examined the device internally, while others became apparent when I rebult the device and tried to use it.
Keyboard:
The R key on the old keyboard had cracked at first, then eventually split completely into 3 parts during use. One part fell away while the other two remained stuck to the flexible plastic backing of the keyboard structure.
As I mentioned above, the cheap new keyboard did not fit the casing whatsoever (the scale of its design was wrong and it was in total 3-6mm longer than the original part).
I cleaned the original board (the plastic layer with the keys, not the circuit layer) in warm, soapy water and removed the broken R key by plucking it off the flexible backing.
I then plucked the 'r' key off the new keyboard and used it to replace the missing key on the old keyboard, with the aid of some 'Bostik Impact' adhesive.
I finally refitted the old keyboard (with a new R key) to the casing and prayed that it would still work.
It did, in the end, but the R key has less travel and tactile response than the unreplaced keys.
---Tip:---
The unresponsive (or over-responsive) behaviour of the keyboard can primarily be attributed to poor design, but the grit and dirt that enters every keyboard known to man similarly affects that of the X1 and worsens the problem.
Removing the plastic portion of the keyboard unit and washing it in warm, soapy water is a good way to at least regain the functionality that the keyboard had when you first got the device.
​
Vibration Motor:
I saw the physical evidence of the claim that the camera light LED is badly designed and prone to overheating, in turn killing the vibration motor.
In the original phone casing, the plastic housing that surrounds the LED had melted and resolidified over the course of the phone's life and there was minor scorching on nearby components.
The vibration motor for the device is situated directly beside the LED (to the left, while the rear camera lens is to the right) and seemed unable to function with the melted plastic in its way.
I cleared away the melted plastic but the motor still only 'clicked' when I later tested the vibration.
It seems that the motor gets burned out by trying to work when obstructed by the plastic, or the heat from the LED kills the motor internally.
One way or the other, it's dead.
---Tip:---
The recommendation to not use the light for extended periods of time on the X1 still stands, it's worrying to think of how much worse the damage could get if the light were left on longer.
It is an especially worrying issue when you consider that the light LED is so close to the main Li-Polymer battery of the phone.​
Broken Side-mounted buttons:
The next problem I encountered in the original phone casing was that of the weak rubber straps that hold the side-mounted buttons (power, camera, volume-rocker) in place.
These rubber components are quite thin and weak, as well as prone to snapping when stressed.
The purpose of these straps is to hold the button in place (flush-mounted) and to provide the spring action and make the buttons return after pressing.
In my case, the strap holding the power button had weakened and the button stopped working properly, while the phone behaved as if the button was being constantly held in.
The phone constantly brought up the "Are you sure you wish to power off the device?" prompt in WinMo.
When I set about trying to remove the old button to replace it with a new one from my pack of replacement parts, the old rubber strap almost instantly snapped!
I replaced the old button eventually, but even now there is less travel in the button and barely any tactile response when it hits the internal switch on the PCB.
---Tip:---
When re-inserting the PCB during re-assembly, keep an eye on all of the side-mounted buttons to make sure that their inwards-pointing nub sits *above* the PCB and is able to reach the board-mounted switch that the button controls!​
Incompatible Screws:
Beware that the screws from the phone's original casing do not properly fit the cheaper replacement casing.
This means that you will have difficulty in forcing the screws to fit (and possibly shear the heads off the screws, which is a pretty major problem in a delicate device like this where they will be difficult to remove).
If you force the screws to fit due to a lack of any replacement screws to use, they will likely not sit properly flush-mounted with the original casing, particularly on the front (touchscreen) half of the device; and this may prove problematic for the sliding mechanism.
Additionally, it means that the casing will not close properly, resulting in gaps between the casing and touchscreen as well as gaps along the sides of the device.
---Tip:---
If you must do your own repairs on the device, try to get the official replacement parts from Sony Ericsson.
Buying the cheaper replacements from eBay is a false economy and a major headache, take my word for it!​
Malfunctioning Antenna:
When I first rebuilt the phone after repairs I discovered that I could only get very weak intermittent radio signals in places that I previously had full signal strength.
This problem occured only because of incorrect re-assembly by me, but it represents a pitfall that might catch someone else out when re-assembling their X1.
---Tip:---
When reattaching the Antenna unit (the black shroud that sits around the rear camera lens and which also contains the camera LED), be sure to firmly press on the left side of the plastic (where there are visible metal strips in the plastic) until you hear a click to signify that the shroud is properly attached.
Otherwise, the antennae embedded in the plastic will not properly contact the main PCB of the device and your reception for all radio antennae in the device (GSM, WiFi, etc) will be weakened or lost completely.
This problem was caused solely by my inexperienced maintenance of the device, but may be related to the weak-signal problems some people experience with the X1, at a guess.
Ammendment:
------
I may be mistaken on this one! I had originally thought that this component held the antennae, but after further experimentation I've come to think that the antennae may be housed alongside the speaker unit in the other end of the phone. The tip still stands, just to be on the safe side!
​
Malfunctioning Speaker/Microphone:
During use early in the phone's life I sometimes found that the phone's main speaker stopped working for apparently no reason and that squeezing the casing 'fixed' the problem until it occured again seemingly at random.
Within the rear plastic portion of the casing that forms the battery compartment there is a small module comprising the phone's primary speaker and in-call mic underneath the plastic piece that contains the SE circular logo.
These components make only surface contact with the main PCB of the phone and are not soldered in-place.
In my case, the small copper contacts that extend outwards from the speaker unit had become flattened somehow within the device and no longer reached their counterpart contacts on the main PCB when the device was closed-up.
---Tip:---
Extending the speaker contacts outwards with a fingernail seemed to rectify this problem for me.
Be sure to tightly screw the module back in when you're done, just to make sure of the circuit-contact.​
Touchscreen Ribbon-cable:
This problem was mentioned by others in a thread here: http://forum.xda-developers.com/showthread.php?t=561151
I very rarely encountered that problem in my typical usage of the X1, but after my repairs this issue seemed to become exacerbated (probably due to strains placed on the ribbon cable during my reassembly of the device numerous times).
Currently my touchscreen works as it should in portrait mode, but I cannot extend the keyboard, as this causes the screen to still display a signal, but not respond to any touches.
Upon sliding the keyboard back in, the touchscreen is out of the alignment by about 5-6mm every time until I re-align it under WinMo settings.
In an attempt to fix this problem I covered the exposed portion of the ribbon cable with thin insulating tape, in the hope that this would stop the traces of the cable shorting against the metal casing.
Unfortunately, this hasn't proven enough and I have not yet solved this issue.
It looks as though I need to buy a replacement ribbon cable and fix the device that way.
========================
---Other Tips:---​
+ Make sure you have all the tools you need.
Replacement parts come with the necessary tools, but if you don't get those you're going to need a tiny phillips screwdriver, a tiny 6-point star-headed screwdriver and a thin, stiff implement such as a credit card or guitar plectrum to open the casing.
I also recommend a snipe-nose pliers and a tweezers for more delicate parts.
Adhesives & Bonding Agents can be useful in certain applications, but use them sparingly (or don't use them at all, to have any chance of making the phone look untampered for warranty purposes!).
+ Don't expect cheap replacement parts to fit perfectly!
They're cheaper for a reason, you get what you pay for, except in the case of the phone itself.
+ Be gentle with all of the components.
The Xperia X1 feels nice and sturdy when it's assembled, but the individual components can be flimsy and brittle when separated.
Everything from the plastic casing to the circuitry inside needs to be handled with care and treated gently to avoid being broken.
That's everything for now, but if I think of any more issues or tips I'll amend this post.
Please feel free to comment with other issues and any other maintenance tips you've discovered and we can build a useful list for people to refer to.
========================
=======
Conclusion:
=======​
Before opening my Xperia I didn't really know what to expect inside.
I'm very familiar with computers and I build my own systems as a hobby, but my knowledge of circuit-level electronics is limited and I have no prior experience of manually repairing devices like the Xperia.
My experiences show that some of the common hardware problems can be resolved by the end-user with some patience and the right tools or parts, but one needs to be extremely careful not to end up with more problems than one started with!
=======
Disclaimer:
=======​
I won't be held responsible for any damage you do to your phone and I do NOT recommend that you actually perform any of these procedures.
It is better to let qualified technicians at SE's Warranty Service handle these issues.
I'm providing this information solely for those people who either want to do it or have no other choice to get their phone working again.
The information presented is a combination of information collated from guides that I've linked herein and my own experience but I cannot guarantee their accuracy beyond that.
Treat everything in these informational posts as opinion or observation, not fact!
=======
Links & Other Information:
=======
This post will contain any other helpful information or links pertaining to the disassembly, repair and reassembly of the X1.
​
This is Cellular Nationwide Network's selection of spare parts for the X1:
http://cnn.cn/shop/sonyericsson-xperia-c-28_638.html
This online store also offers the X1 replacement LCD/Digitizer unit:
http://www.formymobile.co.uk/proddetail.php?prod=x1lcd
I have not bought from either of these stores nor can I verify the quality or compatibility of the items they offer!
I'm just listing them here in case people have trouble finding anywhere to get parts!
=======
Disassembly Summary:
=======​
The device needs to be disassembled in the correct order as laid out on this page: http://www.formymobile.co.uk/xperiadisassembly.php
-Remove battery cover, stylus, battery, sim card & micro sdhc card and put them aside.
-Remove the plastic portion of the bottom-rear of the phone (where the SE circle is), using the proper tool, a credit card or a plectrum.
-Unscrew and remove the speaker module
-Remove the screws where the speaker module was
-Remove the covers over the screws at the other end of the phone and then the screws themselves (using the star-headed screwdriver)
-Remove the plastic battery compartment (which also takes the camera cover and stylus slot with it)
-Lift the small black tape and disconnect the plug that powers the camera LED
-Remove the screw in the top-right, then left the black lens-shroud it was holding down.
-Remove the small plug on the ribbon cable at the top-right (this connects the keyboard unit to the main PCB
-Pull the clips around the edges of the green PCB back gently to release it (but do not pull it upwards).
-Lift the PCB gently and (Very) gently remove the orange tape that covers the touchscreen ribbon cable attached underneath, then pry that ribbon cable's connector away from the connector on the green PCB.
-Lift the PCB away and put it aside
-The keyboard circuit and plastic pad can now also be lifted away if necessary.
--- This is where you can stop if your repairs/maintenance only affect the rear portion of the device. Only go further if you need to perform repairs on the front/touchscreen portion. ---
-Remove the four shallow screws underneath where the green PCB previously lay to separate the rear housing from the slider mechanism.
-Remove the four screws in the front portion of the phone, then pry the casing open with the tool/card/plectrum as before.
-The main ribbon cable is attached to a small PCB and some other ribbon cables which are concealed underneath the grey fuzzy foil on the surface in front of you.
-That foil can be removed but it is not necessary to do so unless you are replacing the LCD screen unit, receiver-speaker, front-camera or the ribbon cable assembly itself.
-The Touchscreen component is held down with small grey braided straps at the corners, peel these back to release the touchscreen from the front fascia.
Then do all of that in reverse to put the phone back together!
=======
Videos:
=======​
I found these videos on youtube, I didn't record or upload them.
Video guide to Disassembling the Rear half of the device:
http://www.youtube.com/watch?v=AWDurQrRt-Y
Video guide to Disassembling the Front half of the device:
http://www.youtube.com/watch?v=iyGUbxFqvyc
Video guide to Reassembling the Front half of the device:
http://www.youtube.com/watch?v=RcDqyEyC_HY
Video guide to Reassembling the Rear half of the device:
http://www.youtube.com/watch?v=V0sOaIo6724
=======
Personal Comment:
=======​
It goes to show that, as many of us are already aware, you must pay a premium price for this phone but it is NOT manufactured like a premium product.
If my situation were rare or I had only one of the above mentioned hardware issues with a new phone I could accept it, but things got ridiculous with the X1.
The build quality is very poor overall and Sony Ericsson should be ashamed firstly for releasing a device onto the market that functioned as little more than a flawed prototype for the X2; and secondly for charging upwards of €600 for the 'privilege' of putting up with its many problems and shortcomings.
I for one, won't be buying any more SE phones.
My next smartphone will be an Android device such as a Motorola Milestone if I ever pluck up the courage to spend that much money on a phone again.
=======
Disclaimer:
=======​
I won't be held responsible for any damage you do to your phone and I do NOT recommend that you actually perform any of these procedures.
It is better to let qualified technicians at SE's Warranty Service handle these issues.
I'm providing this information solely for those people who either want to do it or have no other choice to get their phone working again.
The information presented is a combination of information collated from guides that I've linked herein and my own experience but I cannot guarantee their accuracy beyond that.
Treat everything in these informational posts as opinion or observation, not fact!
Useful post, but it really seems that the majority of your issues were caused by the imitation housing that you purchased, not by poor SE build quality. Of all the issues you mentioned, the keyboard issues are an SE/HTC quality control problem, I've experienced them as have many. The rest seem to have been caused by the imitation housing. This begs the quesiton, why didn't you just use SE's warranty service? They don't require a reciept or that you be the original owner. And trust me, they are several times better than HTCs warranty service.
sonus said:
Useful post, but it really seems that the majority of your issues were caused by the imitation housing that you purchased, not by poor SE build quality. Of all the issues you mentioned, the keyboard issues are an SE/HTC quality control problem, I've experienced them as have many. The rest seem to have been caused by the imitation housing. This begs the quesiton, why didn't you just use SE's warranty service? They don't require a reciept or that you be the original owner. And trust me, they are several times better than HTCs warranty service.
Click to expand...
Click to collapse
I'd hardly call the problem of the non-fitting screws a majority! The rest of the issues were unrelated to the cheap replacement housing.
Maybe my post is confusing, but the issues with the keyboard, vibration motor, ribbon cable, side-buttons & speaker all existed long before I ever ordered the replacement casing!
Some, such as the ribbon cable and antenna were issues that cropped up or were worsened due to my inexperienced maintenance, but everything else was a fault of the build quality of the original device.
The incompatibility of the screws was the only problem specifically caused by the new housing, while its own supplied keyboard didn't fit the chassis, but that was a non-issue since I used the original keyboard anyway.
It could be said that my repairs would have gone significantly smoother if I had bought and used an official replacement housing from SE, but that would only solve the issues of the screws and replacement keyboard.
I put emphasis on the problems related to the cheap replacement casing primarily to warn people away from wasting their money on them the way I did.
I'll edit the original post for clarity.
To answer your question, I didn't use the Warranty service because frankly I assumed they would need a proof of purchase for the warranty (since most warranties do in my experience) and I had bought the device second-hand on eBay.
Secondly, sending the device in for warranty would mean going through the hassle of reflashing a stock rom and SPL to the phone.
Thirdly and most importantly, I wanted to try doing it myself for the experience and potential savings.
Obviously, I wouldn't recommend anyone to try and repair their own phone as I did, but if someone has had a phone sent back to them marked as "tampered" by the warranty service and are left with the options of paying for repairs, paying for a new phone, or buying parts and repairing it themselves.. well that option is there and this thread might help them.
Also, off-topic but I couldn't agree more with your signature. I tried a myriad of fancy ROMs and shell replacements for my X1 but never found satisfaction until I flashed a basic blank WM6.5 ROM and installed PointUI Home2!
Thanks this post helped me out, I suddenly lost my mic, took a look under the hood and found I had the same issue as you, the mic pins not touching. The pins are very weak so had to be careful but it works now!
tumpin said:
Thanks this post helped me out, I suddenly lost my mic, took a look under the hood and found I had the same issue as you, the mic pins not touching. The pins are very weak so had to be careful but it works now!
Click to expand...
Click to collapse
Glad to help!
Definitely the most thorough repair and tips guide for the x1. A lot of the issues you had are the same as mine. Thanks to your suggestions I got my phone in almost working condition. Now I just need to find a way to get my keyboard working again.
Sent from my xperia x1 using XDA App
Thanks Zurechial for this thorough post. I for one, have been lucky in finding a repair guy (non-SE) who is an expert with devices like the X1. I had a problem that some water/moisture/sweat had seeped in the charging port and I could not get the phone to charge. He fixed it for me.
Now the only problem I face is that the camera is not working, and wifi is disabled. Any tips to get the Wifi working? It is shown as disabled in the Comm Manager and there is no WLAN MAC Address also for it.
brilliant post, thank you very much indeed. I have just ordered a cheap housing off ebay, i know what to expect now
What worries me the most though, is how the keyboard WILL fail eventually ><
The qwerty keyboard is one of the main reasons why i got the phone.
time to snatch back our lives suckers
Apparently, it's taken less than 20 years, to destroy the Consumer Electronics Industries, ability to Repair products, sold in this country. I saw the writing on the wall, in the early 80's, with the first lines of "off shore", throw away VCR's, that were priced cheaper than they'd cost to repair. The theory, if it breaks, throw it away & buy a new one. Who cares if it winds up in a land fill somewhere.
Now, we're up to $500 Cell Phones, with the state of repair being either, unit replacement, or, cannibalization of parts. And apparently no one cares. Is it our complacency or can we really afford as a society, to buy a new phone every time one breaks? God knows we're all desperate, for our phone usage.
It's time to snatch back the repair ability we once had. This is the age of recycling, and the highest form of recycling is repair.
As consumers, start demanding access to schematics, and, access to sources of component level repair parts.
IM
You help me...
I'm almost freaking out when signal on my phone show only 2 bars...
Anyway...
it's for additional information,
use handscoon, it gives somewhat confident and when using tweezer, hold it like using pen (I learnt it when I studied as paramedic) because it will give me strength while holdin it.
AND ask the seller to send housing with screw. I bought 2 housings, from ebay and another hongkong shop. Ebay is s%ck but that other hongkong shop is more fit.

[Q] Phantom touches/unresponsive touch screen - only when the back cover is on

So I've been using my N7 on and off since I bought it in January. I would've used it more if it wasn't for the fact that the touchscreen responded really bad to touch and freaked out every now and then. It even almost bought an app on its own in the play store once. As I bought it through a retailer in another country I figured I would try to fix the problem myself - and I did kind of.
I tried a lot of things that people suggested in other threads here on xda, reddit, youtube, etc. but the only thing that seemed to work somewhat was tightening the screws around the edges after opening it up. The problem still persisted to some degree and got worse again after a few weeks.
After opening it up again a few weeks ago to fiddle around with the screws again I realized something - the phantom touch problem was gone and the screen had perfect response whenever I was handling it with the back cover off. So I put it in a case without putting the cover on first and I've been using it like that ever since - this leaves the wifi/gps/etc. without a grounding connection though, and I also prefer to use it without a case so my question is this:
Has anyone had the back cover apply pressure/mess with the touch screen in any way?
I have no screen lift at all, but these are the methods I have tried:
Tightening screws(worked somewhat)
Loosening screws(didn't work)
Putting a small piece of paper between the black cable that apparently connects the touch screen and the circuit board in case it was causing a short there due to pressure or something(didn't work)
Additional info: Whenever I remove the back cover, the only place where I have to apply some extra pressure to get it loose is right around where the aforementioned black cable is.
erikkr said:
So I've been using my N7 on and off since I bought it in January. I would've used it more if it wasn't for the fact that the touchscreen responded really bad to touch and freaked out every now and then. It even almost bought an app on its own in the play store once. As I bought it through a retailer in another country I figured I would try to fix the problem myself - and I did kind of.
I tried a lot of things that people suggested in other threads here on xda, reddit, youtube, etc. but the only thing that seemed to work somewhat was tightening the screws around the edges after opening it up. The problem still persisted to some degree and got worse again after a few weeks.
After opening it up again a few weeks ago to fiddle around with the screws again I realized something - the phantom touch problem was gone and the screen had perfect response whenever I was handling it with the back cover off. So I put it in a case without putting the cover on first and I've been using it like that ever since - this leaves the wifi/gps/etc. without a grounding connection though, and I also prefer to use it without a case so my question is this:
Has anyone had the back cover apply pressure/mess with the touch screen in any way?
I have no screen lift at all, but these are the methods I have tried:
Tightening screws(worked somewhat)
Loosening screws(didn't work)
Putting a small piece of paper between the black cable that apparently connects the touch screen and the circuit board in case it was causing a short there due to pressure or something(didn't work)
Additional info: Whenever I remove the back cover, the only place where I have to apply some extra pressure to get it loose is right around where the aforementioned black cable is.
Click to expand...
Click to collapse
Hmm, have you checked the N7 under a florescent tube light? You should try to view the light's reflection on the n7's screen. It should be 'mirrored perfectly'. If the reflection of the light is crooked/bent, this means your screen is no longer flat. Ie. A flat mirror should show your reflection as it is. A curved mirror will distort the reflection.
If the screen is heavily distorted, this could mean the touch sensors are also 'bent' and touching the screen internals.
Check the reflection with cover on, and also cover off.
If with the cover off the n7, the screen seems to be 'flatter'. Then we could conclude the screen is fatigued by stress somehow by the attachment of the covers. If it somewhat same, then the problem is something else.
Since the cover provides ground points for the n7 circuit and it's antennas, maybe you should try cleaning the contact points on the cover side. There should be grooves made by the contact pins from the n7 on the cover, over time they might oxidize and cause a short circuit.
It is possible the touch mechanism is not being properly grounded somehow.
PLEASE BE EXTREMELY CAREFUL if you are going to clean the contact pins on the n7 side, they are small and very brittle.
Try to see if anything on the cover is touching the circuit board or creating a short circuit somewhere when installed.
These are the 2 causes i can think of. I had this problem too, i loosen some screws and re-check under a florescent light to see it's reflection, and i re-loosen or tighten until the reflection is nearly perfect (screen should be flat and reflecting like a mirror), if not it is bent by stress from screws being too tight or loose at some points.
Then i also cleaned the contact points and pressed the aluminum 'heatsinks' on the n7 side to make sure they dont contact anything else. I did both the same time, following by a switch in ROM and Kernel. So i'm not sure which actually helped. I'm sure i took some stress off the screen by the reflection thing. The grounding also makes sense as an intermittent ground causes stuff to f-up (my car) lol. But you may try n see how it goes. Cheers.

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